========================================So it seems the low flash point is better? If so why not outboard motor oil?
Outboard oil is generally used in water cooled equipment (ie: water cooled outboards), and is designed for lower cylinder head temps. Using outboard oil in air cooled 2 cycle engines will likely result in more carbon fouling and buildup on plugs, pistons, and rings, than 2 cycle oil which is designed for use in engines with higher cylinder head temps.So it seems the low flash point is better? If so why not outboard motor oil?
I choose the Amsoil oil because of its supposed ability to prevent carbon buildup. I will keep this group posted on my findings.
I run 100LL because i dont know anything about pump gas down at the station.
I didn't think i would like the 582, but so far haven't had a reason not to.
I ran 100LL in a 2 stroke when I had to for long flights. Always had shorter plug life when I used 100LL. Sometimes the lead deposits could be seen as bumps on the electrodes. One time it bridged the gap. The bridged gap occurrence was not after all that many hours. I never ran more than 10 gallons of 100LL before being back home and using auto premium.I have been told lead is bad for two-strokes, fouls the plug. Temperature issue? Course it can foul the plugs in my Lycoming too,
Modern petroleum base 2 stroke oil has solvents in it to improve mixing. (some of us remember when it was the viscosity of motor oil) It has a lower octane than gasoline. According to a Shell lubrication specialist we had at a forum once - adding oil to gasoline lowers octane 2- 4 octane points. Storing fuel in polyethylene fuel tanks can cause a loss of octane in the range of 3 octane points per month as the polyethylene is permeable to the octane improving agents in the fuel.Seems I heard on some 2-smoke forum that oil actually burns hotter than gasoline.